Yamaha YZ450F Manuel D'atelier Du Proprietaire page 214

FRONT FORK OIL SEAL AND DUST SEAL CLEANING/
FRONT FORK INTERNAL PRESSURE RELIEVING/
FRONT FORK REBOUND DAMPING FORCE ADJUSTMENT
EC36D001
FRONT FORK OIL SEAL AND DUST SEAL
CLEANING
1. Remove:
Protector
G
Dust seal 1
G
NOTE:
Use a thin screw driver, and be careful not to
damage the inner fork tube and dust seal.
2. Clean:
Dust seal a
G
Oil seal b
G
NOTE:
Clean the dust seal and oil seal after every
G
run.
Apply the lithium soap base grease on the
G
inner tube.
FRONT FORK INTERNAL PRESSURE
RELIEVING
NOTE:
If the front fork initial movement feels stiff during
a run, relieve the front fork internal pressure.
1. Elevate the front wheel by placing a suit-
able stand under the engine.
2. Remove the air bleed screw 1 and
release the internal pressure from the
front fork.
3. Install:
Air bleed screw
G
EC36H002
FRONT FORK REBOUND DAMPING FORCE
ADJUSTMENT
1. Adjust:
Rebound damping force
G
By turning the adjuster 1.
Stiffer a →
Softer b → Decrease the rebound damp-
3 - 34
INSP
ADJ
1 Nm (0.1 m · kg, 0.7 ft · lb)
Increase the rebound damp-
ing force. (Turn the adjuster
1 in.)
ing force. (Turn the adjuster
1 out.)